Here's a surprise

[Contenderizer]

I've been reloading 22 Hornets using Remington 45 gr HPs. I decided to change to 36 gr HPs, so I purchased a box of Barnes Varmint Grenades to play around with. Much to my surprise, the lighter Barnes bullets were considerably longer than the Remingtons (.697 " vs .520"). Is there any lead in the Barnes or are they pure copper? The box doesn't say.